Digestive system, breaks down food and absorbs nutrients, Digestion, breakdown of food into small molecules, Physical digestion, food broken by crushing and mixing, Chemical digestion, food broken down by enzymes, Mouth, chews food and starts starch digestion, Gullet, pushes food to the stomach, Stomach, churns food and digests proteins, Small intestine, completes digestion and absorbs nutrients, Large intestine, absorbs remaining water and mineral salts, Rectum, stores faeces temporarily, Anus, opening where faeces leaves the body, Enzymes, biological molecules that speed digestion, Carbohydrases, digest carbohydrates into simple sugars, Proteases, digest proteins into amino acids, Lipases, digest fats into fatty acids, Carbohydrates, main source of quick energy, Proteins, needed for growth and tissue repair, Fats, broken into fatty acids and glycerol, Simple sugars, used in respiration to release energy, Amino acids, used for growth and repair, Fatty acids, used to make fats in body, Glycerol, combines with fatty acids, Respiration, releases energy in body cells, Constipation, faeces moves too slowly, Gastritis, painful swelling of stomach lining, Food poisoning, illness caused by contaminated food, Diabetes, high blood sugar level, Fibre, helps prevent constipation, Bacteria, can be helpful or harmful

Human Digestive System

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